Added a new echo likelihood stat that reports the maximum value from a previous time period.

webrtc/media/engine/webrtcvoiceengine_unittest.cc

Index: webrtc/media/engine/webrtcvoiceengine_unittest.cc
diff --git a/webrtc/media/engine/webrtcvoiceengine_unittest.cc b/webrtc/media/engine/webrtcvoiceengine_unittest.cc
index 8ad5d97ce317ac888e414adcd1cfab478523dd53..f15bde68b734964577ce9ba7215a10124ee43464 100644
--- a/webrtc/media/engine/webrtcvoiceengine_unittest.cc
+++ b/webrtc/media/engine/webrtcvoiceengine_unittest.cc
@@ -480,6 +480,7 @@ class WebRtcVoiceEngineTestFake : public testing::Test {
     stats.echo_return_loss = 890;
     stats.echo_return_loss_enhancement = 1234;
     stats.residual_echo_likelihood = 0.432f;
+    stats.residual_echo_likelihood_recent_max = 0.6f;
     stats.typing_noise_detected = true;
     return stats;
   }
@@ -509,6 +510,8 @@ class WebRtcVoiceEngineTestFake : public testing::Test {
     EXPECT_EQ(info.echo_return_loss_enhancement,
               stats.echo_return_loss_enhancement);
     EXPECT_EQ(info.residual_echo_likelihood, stats.residual_echo_likelihood);
+    EXPECT_EQ(info.residual_echo_likelihood_recent_max,
+              stats.residual_echo_likelihood_recent_max);
     EXPECT_EQ(info.typing_noise_detected,
               stats.typing_noise_detected && is_sending);
   }